Peking Opera star Cheng Mobai unfortunately fell into the Huangpu River while participating in a secret operation against traitors. When he opened his eyes again, he was on the Bund of Shanghai in 2018. He was rescued by Yu Wanqing, a scholar of local history.
What shocked Cheng Mobai was that the unknown woman in front of him had the same appearance as Yu Xueyi, the lesbian who made him have a grudge eighty years ago. Back then, Yu Xueyi had been mistaken for a betrayer by him because of an incident in a key operation.
As a dusty old diary reappears, the fog of 80 years ago gradually dissipates: Yu Xueyi is actually a lurker who went deep into the enemy camp. For the sake of national justice, she alone bears the misunderstanding and infamy, and writes her sincerity with forbearance.
At the same time, descendants of the family from overseas are secretly searching for an ancient artifact called the "Tide Mirror". It is said that this treasure contains the mysterious power that affects time and space.
